Mokbis m



M. M. AND J. SANDUSKY.

SHOE SHANK.

APPLICATION FILED FEB. 9, 1921.

1 ,384,858. Patented July 19, 1921.

UNITED STATES PATENT OFFICE.

MORRIS M. SANDUSKY AND JOSEPH SANDUSKY, OF NEW YORK, N. Y.

SHOE-SHANE Specification 01 Letters Patent.

Patented July 19, 1921.

Application filed February 9, 1921. Serial No. 443,628.

To all whom it may concern:

Be it known that we,MoRRIs M. SANDUsKY and Josnru SANDUSKY, citizens of the United States, residing at New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Shoe-Shanks, of which the following is a specification.

Our invention relates to shoe shanks and one of the objects of the invention is to provide a device of this character which can be economically manufactured in large quantities and which when attached to the leather will be securely held in position.

With this and other objects in view, our invention consists in certain novel and peculiar features of construction and combination of parts as hereinafter more fully described and particularly pointed out in the claims.

Referring to the drawing for a more complete disclosure of the invention,

Figure 1 is a plan view showing the metal shank in position attached to the leather;

Fig. 2 is an elevation of Fig. 1;

Fig. 3 is a view of one end of a metal blank before bending the teeth over;

Fig. 4 is an elevation showing the position of the teeth in the finished shank;

Fig. 5 is a view of a shank, removed from the leather after having been driven in.

The shank, struck up from sheet metal, is provided with a stiffening rib 2 and a pair of teeth 3 at each end. In order to economize metal, the teeth in the shank are cut as shown in Fig. 3, the outer side of the teeth being a continuation of the straight edge 6. These teeth are afterward bent to the position shown in Fig. 4, the idea being to bend them in such a way that the bevel 4 on the outer side of the teeth will be directed inward. In order to get the teeth in this position, it is necessary to bend them obliquely inward along the oblique line 5, thus placing the normal planes of the teeth at an angle to each other. The object of having the bevel on the outside, is so that when the shank is driven into the leather, the teeth will have a tendency to clench toward each other, as shown in Fig. 5. If the teeth were not bent obliquely but in the same plane, then the bevel would be on the inside, and when the pron were driven into the leather there would e a tendency for them to spread apart, split the leather and become loose. When the teeth 3 are bent obliquely so as to have the bevel on the outer side, the result is to make the inner sides of the teeth parallel, as shown in Fig. 5, thus having no tendency to spread the teeth as they are driven into the leather:

When the shank is secured to the leather, the leather is placed on an anvil and the teeth of the shank driven in. The teeth being somewhat longer than the thickness of the leather, the pointed ends bend over and clench toward each other longitudinally of the shank, in addition to the transverse bending toward each other, on account of the outer cam surfaces.

Our invention is advantageous because on the one hand, it permits cutting the blanks with a minimum of waste and at the same time, manipulating the blank in such a manner as to get a relative disposition of the teeth as would ordinarily be attained only by a more wasteful cutting of the blanks.

From the above description it will be apparent that we have produced a device of the character described, which accomplishes the purpose for which it is intended, and while we have illustrated and described the preferred form of our invention, it will be understood that we reserve the right to all changes properly falling within the spirit and scope of the appended claims.

Therefore what we claim as new and desire to secure by Letters Patent is:

1. A shoe shank comprising a plate provided at its end with opposed teeth, each of the said teeth having its outer edge beveled and longer than its inner edge to cause them to bend toward each other on being driven into the leather.

2. A shoe shank comprising a plate provided at its end with opposed teeth, the planes of the teeth being at an angle to each other. each of the said teeth having its outer edge beveled and longer than its inner edge to cause them to bend toward each other on being driven into the leather.

3. A shoe shank comprising a plate provided at its end with opposed teeth, the planes of the teeth being at an angle to each other, the said teeth being beveled on the outer sides, and substantially parallel to each other on their inner sides.

4.Amethod of making a shoe shank stiffener comprising notching the end of the stiffener blank to provide a pair of teeth having their outer sides parallel, and bending the said teeth with their faces substantially normal to the plane of the shank and at an angle to each other to provide a bevel on their outer sides.

5. A shoe shank comprising a long and relatively narrow plate ofsheet metal provided at its ends With opposed, bent over teeth, the said teeth having outer surfaces at a greater inclination to the vertical than the inner surfaces to cause the said teeth to bend toward each other on being driven into the leather,

6. A shoe-shank comprisinga plate provided at its ends with opposed teeth, the planes of the" faces of-tlie teeth beingat'an angle to each other, the' said teeth having outer surfaces at a greater inclination to the vertical than the inner surfaces to cause the said teeth to bend toward each other on being 4 driven into the leather.

7. A shoe shank comprising a plate provided at its ends with opposed teeth, the

stiffener, comprising notching the end of the blank stiffener to provide a pair of teeth,

bending the said teeth with their faces sub-' stantially normal to the ,plane of the shank and at an angle to each other so that the outer edges are'at a greater inclination to the vertical than the inner edges.

In testimony whereof We afiix our signa- I tures.

MORRIS M. s-ANDUs Yf JOSEPH sANDUsKY. 

